r with good fluidity in various fields.
Other information
Installation method:
Vertical or horizontal installation
M-ELL-SA External level switch is a non-contact level switch by using the Variable frequency ultrasonic technology, it is widely applied to all kinds of liquid level detection. The measuring probe is installed on the external wall of the container. And it belongs to a completely non-contact instrument which measure the level from outside of tank. Working Principles of the External Level Switch The measuring probe of the instrument can send the ultrasonic and detect the residual vibration signal in the wall of the container. The amplitude of the residual vibration signal will becomes smaller when the liquid is over the probe. A switch signal will be outputted after such change is detected by the instrument. The Variable Frequency Ultrasonic Technology is invented by the DingHua and it is the world¡¯s leading ultrasonic signal change detection technology. The main problem for the traditional ultrasonic level switch is that the ultrasonic signal can be interfered by the attachments from the tank wall and the amplitude of residual vibration signal can be changed by the drift of the temperature and time, thus the misinformation phenomenon is easy to appear. More owned the patent of self adaptive ultrasonic technology of variable amplitude variable frequency and it can effectively eliminate the interference and drift to test the changes of the signal correctly. So that it can be applied to a variety of complex site conditions, stable and reliable long-term work. This product adopts the "micro vibration analysis" external sonar signal processing technology and leading manufacturing process, and ensure the reliability and durability of ELL-SA external variable frequency ultrasonic level switch. Application There is no need to open a hole on the tank wall to install the sensors when the ELL-SA series external level switch is installed. The instrument neither contact the liquid medium nor contact the gaseous medium in the container. Therefore, the installation is simple and quick, safe and secure. No need to clear the tank while repair and maintenance, no influence on the normal operating. ELL-SA series external level switch is applicable to fixed-point liquid level measuring and alarm of all kinds of containers and liquid. It can be widely used in petrochemical, chemical, oil depots, oil, electricity, liquid storage, pharmaceutical and other industries. And it has a significant advantage in the pressure vessel, dangerous chemical liquids, flammable and combustible liquids and fixed-point liquid level measuring and alarm fields. Product features 1¡¢Safety: the valves, communicating pipes, joints are not used in the measurement of poisonous, corrosion, pressure, easy to bums, volatile and leak liquid, and there is no leaks, no contact with the liquid and gas in the container, which is very safe. Even under the condition of instrument damage or repair, there will be no possibility for leakage, poisoning and explosion. (Measuring principle diagram) 2¡¢Easy installation and maintenance: There is no need for tank cleaning and open fire during the installation, no impact on production 3¡¢Durability and reliability: There is no mechanical moving parts in the sensor and instrument, strict sealing, isolation, will not wear or corrode. 4¡¢Widely applicable: It has nothing to do with the medium pressure, temperature, density, dielectric constant, viscosity, and presence of corrosion. carton box and gift box, according to requirement
Thermal level switch
Item name:quartz crystal resonator-tuning fork Type:smd Frequency range:32.768khz Dimension:2*6mm, 3*8mm Dimension:2*6mm, 3*8mm
Power Diodes (Stud/Flat Type) Silicon Diodes are electronic components that conduct current in only one direction. In function, they are similar to one-way valves. Silicon Diodes, using semiconductor materials such as silicon are used as voltage regulators, signal rectifiers, oscillators and signal modulators / demodulators. Semiconductor diodes consist of a PN junction having two terminals, an anode (+) and a cathode (-). Current flows from the anode to the cathode within the diode. Diodes can be used as voltage regulators, tuning devices in RF tuned circuits, frequency multiplying devices in RF circuits, mixers in RF circuits, switching applications, or can be used to make logic decisions in digital circuits. Diodes can be sub-divided into six major categories: General Purpose Diodes (PN junction diodes) PIN Diodes Schottky Barrier Diodes Step-recovery Diodes Varactor Diodes Zener Diodes Laser Diodes PIN Diodes are three-layer Semiconductor Diodes consisting of an intrinsic layer separating heavily doped P and N layers. The charge stored in the intrinsic layer in conjunction with other Diode parameters determines the resistance of the Diode at RF and microwave frequencies. This resistance typically ranges from kilo ohms to less than 1 ohm for a given diode. PIN Diodes are typically used as switches or attenuator elements. Step-recovery Diodes employ graded doping where the doping level of the Semi conductive materials is reduced as the P/N junction is approached. This produces an abrupt turn-off time by allowing a very fast release of stored charge when switching from forward to reverse bias. It also allows a rapid re-establishment of forward current when switching from reverse to forward bias. These Diodes are used in very high frequency (VHF) and fast switching applications. Varactor Diodes are P/N junction Diodes that are designed to act as a voltage-controlled capacitance when operated under reverse bias. One characteristic of P/N junctions is inherent capacitance. When the junction is reverse biased, increasing the applied voltage will cause the depletion region to widen, thus increasing the effective distance between the two â??platesâ?? of the capacitor and decreasing the effective capacitance. By adjusting the doping gradient and junction width, the capacitance range can be controlled and changes can be applied using reverse voltage. Our Products Automatic Voltage Regulator (AVR) Automatic Transfer Switch (ATS) Power Diodes (Stud/Flat Type) Power Diodes (Capsule Type) Phase Control Thyristors (Stud/Flat Type) Phase Control Thyristors (Capsule Type) Inverter Grade Thyristors (Capsule Type) Power Modules Bridge Rectifier Modules Three Thyristor Welding Modules Bridge Rectifiers Moulded Rectifiers For Generators Mono Block Bridge Rectifiers (Single Phase) Mono Block Bridge Rectifiers (Three Phase) Welding Bridge Rectifiers Field Failure Relay (FFR) Generator Diodes
Product description Making use of the electrical machinery to bring blade revolving, when the medium rises to the blade position, the blade stops rotation because of the impediment of the medium, thus through the related control organization outputs Product specification/models Power supply: 220vac, 110vac, 24vac, 24vdc Contact capacity: 250vac/5a, spdt Operating temp.: -10~80 c( max. 800 c) Power: 3w Blade rotational speed: 1 rpm Balde material: sus304 Protection grade: ip65 Wire outlet: m20*1.5 Application Applicable to the manufacturing and processing equipment in the industry of food, feed, cement, plastics processing, basic engineering, chemical and chemical fiber, etc. Other information Installation method: Horizontal or vertical installtion
These switches have a normally open contact which closes when the switch reaches the acceleration/activation level. 14"x9"x12"
Remote switch.
Tilt switches are used to sense movement (tilt) of a device above and below a horizontal axis. A typical use is in a thermostat. A glass mercury switch is mounted to a bi-metallic spring which expands and contracts with temperature. As the spring moves, the switch contacts pass through the horizontal plane, opening or closing to operate the furnace or boiler. The angle through which the switch must move for proper operation -the differential angle- is measured from the point of just make to just break; it is specified as a maximum. When selecting a tilt switch, it is important to ensure that the operating mechanism can move the switch through an angle greater than the differential angle. Some additional applications include: level controls, appliances, security alarm systems, toys and games, float switches and water-treatment equipment (non-mercury). 14"x9"x12"
Float switches are used to monitor liquid levels by opening or closing when a desired action point is reached. A variety of types are available using mercury and non-mercury tilt switches and, also, permanent magnets and reed switches. Common applications include sumps, pump-control systems, bilge pumps, below ground vaults and irrigation systems. 14"x9"x12"
